Question about Ruud UBHC Air Conditioner

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Ruud gas Furnace UGPH 07EAUER cycles properly heats to temp and shuts down normally.....then a little while later it cycles, but does not ignite. Blower circulates cold air through the house negatiing the heating it has just accomplished. Amber LED flashing rapidly. (I think this is for low flame, I have read that there is a furnace "Cool Down" cycle/mode. It does this even if the thermostat is in the off position. How can I tell if it's a problem at all or normal operation, a problem with the thermostat, or furnace problem??? The furnace seems to work fine except on lower temperatures 64-68 it overshoots the temp as well. I have a mercury switch round thermostat. Not sure where to concertrate my efforts. It is maddending to hear it continue to cycle and do nothing but blow cold air, if I turn the heat up after it stops then it cycles properly, burners ignite etc.

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  • Ruud Master
  • 3,336 Answers

Whew...

Most likely... Your part number (look it up)

RUUD 47-25349-?? (LIKE: 02, 03, 07... etc).
(typically: $10 -$20 range... easy job)

On eBay:


A bit slow getting this answer out on the table...

Sorry anonymous.

BUT for the "over-temp" condition...
Forget the wall THERMOSTAT.
There's usually a switch to option the "DEPTH" of
your heating cycle
(Look up Owners GUIDE for your SPECIFIC MODEL).

The "cool down"... (if there is one) would more
likely be you heaters OWN (fan) THERMOSTAT...

It SHOULD not be getting that much RESIDUAL heat
(possible plenum failure... but hopefully just the switch).

Here you have to ask yourself...
Is IT TIME to get your heater
PROFESSIONALLY inspected...
Pacific Gas & Electric used to do that for FREE...
(
but in this new, improved UTILITY climate
we enjoy today... I doubt they''ll do more than TAKE OUT
a few blocks in SAN BRUNO for FREE anymore...
(you might want to check...
(Same DEDIATED workers w/ really poor Management)).

(My opinion: FAT CAT, CRONY, bought & well-paid
EVIL/corrupt Government "oversight" (CPUC)).

There SHOULD also be a HIGH TEMP
fuel shut off "SAFETY" thermostats..

All these should only be handled with skill & knowledge...
as GAS APPLIANCES can be quite dangerous in the
WRONG HANDS...!!

I am just saying...!!

I'm here daily... Comment me back if unclear.

Happy hunting.

Carnac the Magnificent Y

Posted on May 10, 2017

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5 Suggested Answers

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Posted on Jan 02, 2017

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Anonymous

  • 288 Answers

SOURCE: RUUD Heater and Ac MODEL #UGPH-07EAUER

It sounds like the thermostat is not functioning correctly. Has it been changed recently? I think the green wire is connected directly with red somewhere, maybe touching within the wiring in the wall. Also make sure the thermostat is set to auto not on. Sorry if you knew that but you would be surprised how many people don't.

Posted on Mar 05, 2008

Anonymous

  • 340 Answers

SOURCE: blower fan is not coming on

I recommend you getting service its a safety thing. the humming is the transformer and is normal.. good luck Tom

Posted on Jun 23, 2009

Anonymous

  • 614 Answers

SOURCE: My furnace comes on and heates the house for about

Make sure filters are clean . if they are stopped up the unit will over heat. Lets start there. Russ

Posted on Mar 23, 2010

Testimonial: "James, YOU DA MAN!! I would have never guessed the filters could cause these symptoms. Recent carpet cleaning may have added to filter clogs."

Anonymous

  • 18 Answers

SOURCE: My furnace comes on and heates the house for about

There is a limit switch that is likely opening. Be sure your filters are clean and all registers and grilles are open and not obstructed. If the problem continues, you may have a dirty indoor coil or undersized duct work. Some models have a window where you can observe the LED lights. If when the furnace shuts down you see any blinking, you need to count the flashes and we can figure out what the problem is from there.

Posted on May 22, 2010

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1 Answer

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I did not see that your indoor fan motor started. Near your indoor fan motor there is a temperature switch that is called the fan delay relay. On a temperature rise the relay shuts a contact that turns on the indoor fan motor. If the contact does not close the high temperature limit will shut the gas controls off like your getting. A fan delay relay also allows the fan to run a minute or so to carry away the remaining heat in the furnace and help cool the furnace down. The fan delay relay is normally mounted in a recessed area in the fire wall of the furnace plate. I have also seen them on the top of the furnace heat exchanger. Anyway, the fan delay relay will probably not be available on a sunday, so temporarily until parts are available, try turning the thermostat fan from auto to on and try the furnace again. By turning on the fan to on the high temp limit will not shut you down again.

I have had high temp limit change there trip points, but you said you bypassed it and did the same thing.

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